BMP to PNG Converter

Free, no sign-up. Your files never leave your device.

Saved settings

Only the profile name and settings are saved to your account. Files stay on your device.

    Manage profiles in your account

    By default the capture date is kept and the location is removed

    PNG is lossless, so files are large: a 24 MP photo takes tens of megabytes.

    Usage statistics

    We count page views and operations. A random cookie identifies a browser profile; after sign-in its activity is linked to your account. Your last IP and its observation date are visible only to the site owner and kept for up to 90 days. Daily counts are kept for 90 days, and inactive profiles are removed after 90 days. Formats, outcomes, error codes, and size and time ranges are counted separately. File names, contents and metadata stay on your device. Turning this off deletes the current browser profile.

    How to convert BMP to PNG

    1. Click the box above or drag your BMP files onto it — you can add many at once.
    2. Wait a moment while your browser converts them. Nothing gets uploaded.
    3. Download each PNG separately or grab them all in one ZIP file.

    Why use this converter

    • Your files stay with you

      Everything runs on your device. Images are never uploaded to a server, so nobody else ever sees them.

    • Lossless

      PNG keeps every pixel exactly like BMP but compresses the data, so the image stays the same while the file gets lighter.

    • Transparency is kept

      If the BMP has an alpha channel, transparent areas stay transparent in the PNG.

    • Batch conversion

      Convert up to 100 images at a time and download them as a single ZIP file.

    Frequently asked questions

    What is a BMP file?

    BMP is an old Windows image format. It usually stores every pixel uncompressed, so files are large, and many websites and messaging apps don't accept them.

    Will the image change?

    No. PNG compression is lossless: every pixel stays exactly as it was in the BMP.

    How much smaller will the file get?

    Screenshots, diagrams and drawings with flat areas compress very well as PNG. Photos compress much less; JPG may suit them better.

    Which BMP files are supported?

    Practically all you'll come across: 1, 4, 8, 16, 24 and 32 bits per pixel, with or without RLE compression, including files with transparency and an embedded color profile.

    Are the colors preserved?

    Yes. If the BMP has an embedded color profile, it's copied into the PNG; otherwise sRGB is used, just like in the BMP itself.

    Is it safe to convert my images here?

    Yes. The site only downloads the converter itself; your images are processed in your browser and are never sent to a server.

    More converters

    • BMP → JPG

      Turn a bulky BMP into a light JPG for email, websites and chat.

    • HEIC → PNG

      Lossless copies for editing, design and printing.

    • AVIF → PNG

      No further loss and transparency kept — ready for editing.

    • JPG → PNG

      Keep editing an image without losing any more quality.